Open Access
Table 9.
ANOVA results for surface roughness (Ra) in Hastelloy X.
| Source | Degrees of freedom (DoF) | Sequential sum of squares (SS) | Mean sum of squares (MS) | F-test | P (p < 0.05) | P-coefficient (%) |
|---|---|---|---|---|---|---|
| Feed rate | 1 | 4.1424 | 4.1424 | 56.56 | 0.002 | 33.15 |
| Cutting speed | 2 | 0.18817 | 0.09408 | 1.28 | 0.371 | 1.51 |
| Cutting tool | 2 | 5.04646 | 2.52323 | 34.45 | 0.003 | 40.38 |
| Residual error | 12 | 0.29294 | 0.07323 | 2.34 | ||
| Total | 17 | 12.4974 | 100 |
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